GB/T 6730.8-2016 Iron ores—Determination of iron(Ⅱ) content—Potassium dichromate titrimetric method

GB/T 6730.1-2016 Iron ores—Preparation of predried test samples for chemical analysis GB/T 6730.6-2016 Iron ores—Determination of metallic iron content—Ferric chloride-sodium acetate titrimetric method GB/T 6730.7-2016 Iron ores—Determination of metallic iron content—Sulfosalicylic acid spectrophotometric method GB/T 6730.9-2016 Iron ores—Determination of silicon content—Silicomolybdic blue spectrophotometric method reduced by ammonium ferrous sulfate GB/T 6730.12-2016 Iron ores—Determination of aluminum content—Chrome azurol S spectrophotometric method GB/T 6730.16-2016 Iron ores—Determination of sulfur content—Barium sulfate gravimetric method GB/T 6730.19-2016 Iron ores—Determination of phosphorus content—Bismuth phosphomolybdate blue spectrophotometric method GB/T 6730.20-2016 Iron ores—Determination of phosphorus content—Titrimetric method GB/T 6730.21-2016 Iron ores—Determination of manganse content—Potassium periodate spectrophotometric method GB/T 6730.22-2016 Iron ores—Determination of titanium content—Diantipyrylmethane spectrophotometric method GB/T 6730.29-2016 Iron ores—Determination of barium content—Barium sulfate grarimetric method GB/T 6730.35-2016 Iron ores—Determination of copper content—Oxalic acid bis-cyclohexylidene hydragide(cuprizone) spectrophotometric method GB/T 6730.36-2016 Iron ores—Determination of copper content—Flame atomic absorption spectrometric method GB/T 6730.50-2016 Iron ores—Determination of carbon content—Gas volumetric method GB/T 6730.72-2016 Iron ores—Determination of arsenic,chromium,cadmium,lead and mercury content—Inductively coupled plasma-mass spectrometry method (ICP-MS) GB/T 6730.73-2016 Iron ores—Determination of total iron content—EDTA photometric titration method

GB/T 6730.8-1986 Methods for chemical analysis of iron ores The potassium dichromate volumetric method for the determination of iron (Ⅱ) content

GB/T 6379.1-2004 Accuracy(trueness and precision)of measurement methods and results—Part 1:General principles and definitions GB/T 6379.2-2004 Accuracy(trueness and precision)of measurement methods and results—Part 2:Basic method for the determination of repeatability and reproducibility of a standard measurement method GB/T 6682-1992 Water for analytical laboratory use—Specification and test methods GB/T 6682-2008 Water for analytical laboratory use—Specification and test methods GB/T 6730.1-1986 Methods for chemical analysis of iron ores—Preparation of predried test samples for chemical analysis GB/T 6730.1-2016 Iron ores—Preparation of predried test samples for chemical analysis GB/T 8170-1987 Rules for rounding off of numberical values GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values GB/T 10322.1-2000 Iron ores—Sampling and sample preparation procedures GB/T 10322.1-2014 Iron ores—Sampling and sample preparation procedures GB/T 10322.1-2023 Iron ores—Sampling and sample preparation procedures GB/T 12805-1991 Laboratory glassware—Burettes GB/T 12805-2011 Laboratory glassware—Burettes GB/T 12806-1991 Laboratory glassware—One-mark volumetric flasks GB/T 12806-2011 Laboratory glassware—One-mark volumetric flasks GB/T 12808-1991 Laboratory glassware—One-mark pipettes GB/T 12808-2015 Laboratory glassware—One mark pipettes